Car sputters. Vacuum leak?

[hazza]

I have a slight problem, last night I turned my car on and it started sputtering/hesitating at idle, revved it a bit and it sounded very choppy/farty, I think its coming from my K&n pod filter, I hear a lot of hissing noise coming from it. It only happens during the night, think it may be the cold air and something wrong with my temperature sensor. Also sputters when I accelerate, tho after awhile it goes away. possible vacuum leak?

[fatboyz39]

Vacuum leak won't make it sputter on acceleration. Sounds like a sensor is playing up.

If there was a vacuum leak you'll have a abnormal idle rpm's i.e higher then usual.

Is there a solid cel light on?

[hazza]

no cel light, tho it does idle pretty high, just above 1500rpm. Would you have a clue which sensor it might be? o2 sensor, tps or iacv?

[tinkerbell]

spark plugs OK?

[Norm]

If you use like your throttle body cleaner and spray around joints and if your car revs you it can indicate a leakage somewhere.

[theHKway]

pull ur AFM out and spray it with some good contact cleaner. could be as simple as that

[fatboyz39]

What car? Honda's run MAP sensors not maf. Remove the intake arm and start the car up. Place your hand over the throttle body, if engine dies there no vaccum leak if engine still running there a vaccum leak.